thayee



(No Model.) I

A. P. THAYER.

DIE FOR MAKING BARBED METALLIC FENGING. No. 307,361. Patented Oct. 2-8, 1884.

WITNESSES INVENTOR lhvrrnn STATES PATENT @FFICE'.

ANSON P. THAYER, OF BROOKLYN, N. Y., ASSIGNOR TO OF SAME PLACE.

THOMAS W'. HALL,

DIE FOR MAKING BARBED METALLIC FENCING.

SPECIFICATION forming part of Letters Patent No. 307,351, dated October 28, 1884.

Application filed Novcmbcr30, 1833. (No model.)

T all whom it may concern.-

Be it known that T, ANSON P. THAYER, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful In1provements in Dies for Making Barbed Metallic.

structed and arranged as hereinafter fully de scribed, reference being made to the accompanying drawings, in which Figure l is across-section of the blank strip to be sheared and barbed. Fig. 2 is a plan view of the bed-die and horizontal section of the movable die for making slits at intervals along the strip, also a plan of the bed-die and horizontal sectionof the punch for completing the barbs and the separating of the rods, with a portion of the blank strip as when being slitted and barbed by the dies. Fig. 3 is a plan view of a portion of the blank strip to be separated and barbed, with lines showing the manner of the operation of the shearing (lies on it. Fig. 4 is a-side elevation of the dies represented in Fig. 2 and the blank strip between them.

I make a pair of shearing-dies, a I), having an oblique offset, 0, at the middle of the cutting-edges, said offset being as long as the barbs that are to be made, and the inclination 0 is the same as the bevel edges of the barbs. The faces of these dies are a little convex, as represented in Fig. 4, to enable them to cut through the metal at each side of the dies to make short slits d e f through the uncut metal 4 5 at intervals along the strips, the said slits being partly along the baseline d of the barbs and between two barbs of one rod; thence diagonally ate across between two barbs, one to each rod, and thence along the basc-linef between the barbs of the other rod, and from one barb to another, or nearly so, and by the side of these dies, and a suitable distance from them, either in the same bed and movable stock or separately, I arrange a bed-die, g, and

a punch, h, to act successively to the shearingdies, and punch out the waste piecest' between the barbs by cutting along the diagonal lines j conversely to the lines 6 out by the shearingdies at b, and also finishing the portions left uncut along the lines (I f, the said punch h and 6 die 9 having parallel oblique edges corresponding. to the lines j between two barbs, k, and parallel sides corresponding to the parallel lines (I f cut by the shearing-dies. The blank l strip is to be fed along dies a b, and thence to 6 5 the punch g h a distance equal to the distance of the barbs apart at each movement. The punch g h may be located in such proximity to the dies a b that the waste pieces '17 will be punched out in their first position at rest after passing from said dies a b, or the second, as here shown or farther on. The blank strip consists of the two cores or rods Z, middle web, in, and outer flanges, a. The convex faces of the dies at b enable the metal to bend over the cor- 7 5 ners of the dies at the ends of the slits when punched apart, so as to prevent the cracking and tearing of the metal that would be caused at the ends of the slits if the faces of the dies and the cuttingedges were formed on a straight 8 line from side to side.

That I claim, and desire to secure by Letters Patent, is

The combination ofa pair of shearing-dies, a I), having the oblique offset 0, located mid- 8 way between the extremities of the cutting edges, anda punch and die, 9 h, having parallel sides, and also having oblique parallel edges converse to the oblique offset cof the diesa b, substantially as described.

I In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

ANSON P. THAYER. Vitnessc's:

F. A. THAYER, L. H. MORGAN. 

